<template>
  <div class="container">
    <h1 class="title">todos</h1>
    <div class="warp">
      <header class="header">
        <input
          type="text"
          class="search"
          v-model="val"
          @keyup.enter="shijian()"
        />

        <div class="toggle">
          <input
            id="toggle-all"
            type="checkbox"
            class="toggle-all"
            v-model="select"
          />
          <label for="toggle-all"></label>
        </div>
      </header>
      <main>
        <ul class="todo-list" v-for="item in list1" :key="item.id">
          <li class="todo">
            <input
              type="checkbox"
              class="toggle"
              :checked="item.done"
              @change="gaibian(item.id)"
            />
            <label>{{ item.name }}</label>
            <button class="destroy" @click="cuohao(item.id)"></button>
          </li>
        </ul>
      </main>
      <footer class="footer">
        <span class="todo-count">
          <strong>{{ num }}</strong> {{ num == 1 ? "item" : "items" }} left
        </span>
        <ul class="filters">
          <li>
            <router-link
              to="/all"
              class="all"
              :class="{ selected: qw == 'all' }"
              >All</router-link
            >
          </li>
          <li>
            <router-link
              to="/active"
              class="active"
              :class="{ selected: qw == 'active' }"
              >Active</router-link
            >
          </li>
          <li>
            <router-link
              class="completed"
              to="/completed"
              :class="{ selected: qw == 'completed' }"
              >Completed</router-link
            >
          </li>
        </ul>
        <p
          class="clear-completed"
          v-show="num != list.length"
          @click="qingchu()"
        >
          Clear completed
        </p>
      </footer>
    </div>
    <div class="info" ref="info">
      <p>Double-click to edit a todo</p>
      <p>Written by <a href="http://evanyou.me">Evan You</a></p>
      <p>Part of <a href="http://todomvc.com">TodoMVC</a></p>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      val: "",
      list: JSON.parse(localStorage.getItem("list")) || [],
      list1: JSON.parse(localStorage.getItem("list")) || [],
      qw: "all",
    };
  },
  computed: {
    // 计算数量
    num() {
      return this.list.filter((item) => item.done == false).length;
    },
    // 这个是全选反选
    select: {
      get() {
        return this.list.filter((item) => item.done).length == this.list.length;
      },
      set(value) {
        this.list.map((item) => (item.done = value));
      },
    },
  },
  methods: {
    // 点击使其添加数据
    shijian() {
      this.list.push({
        id: new Date().getTime(),
        done: false,
        name: this.val,
      });
      this.list1 = this.list;
    },
    // 点击错号的时候
    cuohao(id1) {
      this.list = this.list.filter((item) => item.id != id1);
    },
    // 点击使其checked变化
    gaibian(id) {
      this.list.map((item) => {
        if (item.id == id) {
          item.done = !item.done;
        }
      });
      localStorage.setItem("list", JSON.stringify(this.list));
    },

    // 点击这个清除已完成的
    qingchu() {
      this.list = this.list.filter((item) => item.done == false);
    },
  },

  watch: {
    $route: {
      handler(to) {
        this.qw = to.params.tab;
        if (this.qw == "all") {
          this.list1 = this.list;
        } else if (this.qw == "active") {
          this.list1 = this.list.filter((item) => item.done == false);
        } else if (this.qw == "completed") {
          this.list1 = this.list.filter((item) => item.done == true);
        }
      },
      immediate: true,
    },
    list: {
      handler() {
        if (this.qw == "all") {
          this.list1 = this.list;
        } else if (this.qw == "active") {
          this.list1 = this.list.filter((item) => item.done == false);
        } else if (this.qw == "completed") {
          this.list1 = this.list.filter((item) => item.done == true);
        }
        localStorage.setItem("list", JSON.stringify(this.list));
      },
      deep: true,
    },
  },
};
</script>
<style lang="scss" scoped>
.sex {
  width: 1px;
  height: 1px;
  opacity: 0;
}
.sex:checked + label {
  color: red;
}
.box {
  height: 40px;
  position: relative;
  line-height: 40px;
  background: #fff;
}

.tog {
  width: 40px;
  height: 40px;
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  z-index: 9999;
}
.box p {
  height: 40px;
  float: left;
  padding-left: 40px;
  // background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E");
  // background-repeat: no-repeat;
  // background-position: center left;
}

input.tog:checked + p {
  color: red;
  // background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E");
  text-decoration: line-through;
}

.box p::before {
  content: "";
  width: 30px;
  height: 30px;
  border: 1px solid red;
  border-radius: 50%;
  position: absolute;
  left: 0;
  top: 5px;
}

input.tog:checked + p::before {
  background: orange;
}

input {
  outline: none;
}

.container {
  background-color: #f5f5f5;
  min-width: 230px;
  max-width: 550px;
  margin: 0 auto;
  .title {
    text-align: center;
    font-size: 100px;
    font-weight: 100;
    color: rgba(175, 47, 47, 0.15);
  }
}
.warp {
  background: #fff;
  position: relative;
  box-shadow: 0 2px 4px 0 rgb(0 0 0 / 20%), 0 25px 50px 0 rgb(0 0 0 / 10%);
}
.info {
  margin: 65px auto 0;
  color: #bfbfbf;
  font-size: 10px;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.5);
  text-align: center;
}

.info p {
  line-height: 1;
}

.info a {
  color: inherit;
  text-decoration: none;
  font-weight: 400;
}

.info a:hover {
  text-decoration: underline;
}

.header {
  position: relative;
  .search {
    width: 100%;
    height: 50px;
    padding: 10px 16px 10px 60px;
    border: none;
    background: rgba(0, 0, 0, 0.003);
    box-shadow: inset 0 -2px 1px rgb(0 0 0 / 3%);
    box-sizing: border-box;
  }
  .toggle {
    width: 60px;
    height: 50px;
    position: absolute;
    left: 0;
    top: 0;
    .toggle-all {
      width: 1px;
      height: 1px;
      border: none;
      opacity: 0;
      position: absolute;
      right: 100%;
      bottom: 100%;
    }
    .toggle-all + label {
      width: 60px;
      height: 40px;
      font-size: 0;
      -webkit-transform: rotate(90deg);
      transform: rotate(90deg);
      display: inline-block;
    }
    .toggle-all + label:before {
      content: "❯";
      font-size: 22px;
      color: #e6e6e6;
      padding: 10px 30px;
    }
  }

  .toggle-all:checked + label:before {
    color: #737373;
  }
}

.todo-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.todo {
  padding: 0 10px;
}
.todo-list li {
  position: relative;
  font-size: 24px;
  border-bottom: 1px solid #ededed;
}

.todo-list li:last-child {
  border-bottom: none;
}

.todo-list li .toggle {
  text-align: center;
  width: 40px;
  height: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  margin: auto 0;
  border: none; /* Mobile Safari */
  -webkit-appearance: none;
  appearance: none;
}

.todo-list li .toggle {
  opacity: 0;
}

.todo-list li .toggle + label {
  color: black;
  background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23ededed%22%20stroke-width%3D%223%22/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center left;
}

.todo-list li .toggle:checked + label {
  text-decoration: line-through;
  color: #888888;
  background-image: url("data:image/svg+xml;utf8,%3Csvg%20xmlns%3D%22http%3A//www.w3.org/2000/svg%22%20width%3D%2240%22%20height%3D%2240%22%20viewBox%3D%22-10%20-18%20100%20135%22%3E%3Ccircle%20cx%3D%2250%22%20cy%3D%2250%22%20r%3D%2250%22%20fill%3D%22none%22%20stroke%3D%22%23bddad5%22%20stroke-width%3D%223%22/%3E%3Cpath%20fill%3D%22%235dc2af%22%20d%3D%22M72%2025L42%2071%2027%2056l-4%204%2020%2020%2034-52z%22/%3E%3C/svg%3E");
}

.todo-list li label {
  word-break: break-all;
  padding: 15px 15px 15px 60px;
  display: block;
  line-height: 1.2;
  transition: color 0.4s;
  font-size: 18px;
  color: #666;
  text-align: left;
}

.todo-list li label.completed {
  color: #d9d9d9;
  text-decoration: line-through;
}

.todo-list li .destroy {
  display: none;
  position: absolute;
  top: 0;
  right: 10px;
  bottom: 0;
  width: 40px;
  height: 40px;
  margin: auto 0;
  font-size: 30px;
  color: #cc9a9a;
  transition: color 0.2s ease-out;

  border: 0;
  background: #fff;
}

.todo-list li .destroy:hover {
  color: #af5b5e;
}

.todo-list li .destroy:after {
  content: "×";
}

.todo-list li:hover .destroy {
  display: block;
}

.footer {
  color: #777;
  padding: 10px 15px;
  height: 40px;
  text-align: center;
  border-top: 1px solid #e6e6e6;
}

.footer:before {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 50px;
  overflow: hidden;
  box-shadow: 0 1px 1px rgba(0, 0, 0, 0.2), 0 8px 0 -3px #f6f6f6,
    0 9px 1px -3px rgba(0, 0, 0, 0.2), 0 16px 0 -6px #f6f6f6,
    0 17px 2px -6px rgba(0, 0, 0, 0.2);
}

.todo-count {
  float: left;
  text-align: left;
}

.todo-count strong {
  font-weight: 300;
}

.filters {
  margin: 0;
  padding: 0;
  list-style: none;
  position: absolute;
  right: 0;
  left: 0;
}

.filters li {
  display: inline;
}

.filters li a {
  color: inherit;
  margin: 3px;
  padding: 3px 7px;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 3px;
}

.filters li a:hover {
  border-color: rgba(175, 47, 47, 0.1);
}

.filters li a.selected {
  border-color: rgba(175, 47, 47, 0.2);
}

.clear-completed,
html .clear-completed:active {
  float: right;
  position: relative;
  line-height: 20px;
  text-decoration: none;
  cursor: pointer;
}

.clear-completed:hover {
  text-decoration: underline;
}
</style>
